#include <stdio.h>

int main(){
	int a=9;
	int b=5;
	int c=a^b;
	printf("c=%d\n",c);
	printf("%d\n",a^0xFF);
	a^=b;
	b^=a;
	a^=b;
	printf("a=%d\n,b=%d\n",a,b);
	return 0;
}
